The game places the player in the role of a protagonist running or attending a local self-defense dojo. The core narrative hook revolves around the instruction of female students. While the surface premise is martial arts training, the "Secret NTR Lesson" subtitle indicates the true nature of the gameplay: a slow-burning corruption and netorare narrative where the protagonist (or an antagonist) manipulates the students under the guise of "self-defense."
Older versions were often plagued by translation errors or software crashes. The v1910 update is noted for being a much more stable build. The Appeal of the "Dojo" Setting selfdefense dojo secret ntr lesson v1910 better